WordPress — свободно распространяемая система управления содержимым сайта с открытым исходным кодом.

In WordPress 4.9.7, plugins uploaded via the admin area are not verified as being ZIP files. This allows for PHP files to be uploaded. Once a PHP file is uploaded, the plugin extraction fails, but the PHP file remains in a predictable wp-content/uploads location, allowing for an attacker to then execute the file. This represents a security risk in limited scenarios where an attacker (who does have the required capabilities for plugin uploads) cannot simply place arbitrary PHP code into a valid plugin ZIP file and upload that plugin, because a machine's wp-content/plugins directory permissions were set up to block all new plugins.

Multiple cross-site scripting (XSS) vulnerabilities in wp-content/plugins/cforms/lib_ajax.php in cforms WordPress plugin 11.5 allow remote attackers to inject arbitrary web script or HTML via the (1) rs and (2) rsargs[] parameters.

Cross-site scripting (XSS) vulnerability in lembedded-video.php in the Embedded Video plugin 4.1 for WordPress allows remote attackers to inject arbitrary web script or HTML via the content parameter to wp-admin/post.php.

Multiple cross-site scripting (XSS) vulnerabilities in wp-login.php in the Register Plus plugin 3.5.1 and earlier for WordPress allow remote attackers to inject arbitrary web script or HTML via the (1) firstname, (2) lastname, (3) website, (4) aim, (5) yahoo, (6) jabber, (7) about, (8) pass1, and (9) pass2 parameters in a register action.

The Register Plus plugin 3.5.1 and earlier for WordPress allows remote attackers to obtain sensitive information via a direct request to (1) dash_widget.php and (2) register-plus.php, which reveals the installation path in an error message.

Cross-site request forgery (CSRF) vulnerability in the wpcr_do_options_page function in WP Comment Remix plugin before 1.4.4 for WordPress allows remote attackers to perform unauthorized actions as administrators via a request that sets the wpcr_hidden_form_input parameter.

SQL injection vulnerability in ajax_comments.php in the WP Comment Remix plugin before 1.4.4 for WordPress allows remote attackers to execute arbitrary SQL commands via the p parameter.

Cross-site scripting (XSS) vulnerability in wpcommentremix.php in WP Comment Remix plugin before 1.4.4 for WordPress allows remote attackers to inject arbitrary web script or HTML via the (1) replytotext, (2) quotetext, (3) originallypostedby, (4) sep, (5) maxtags, (6) tagsep, (7) tagheadersep, (8) taglabel, and (9) tagheaderlabel parameters.

Cross-site scripting (XSS) vulnerability in wp-admin/admin.php in NextGEN Gallery 0.96 and earlier plugin for Wordpress allows remote attackers to inject arbitrary web script or HTML via the picture description field in a page edit action.

WordPress version <4.9 contains a CWE-20 Input Validation vulnerability in thumbnail processing that can result in remote code execution. This attack appears to be exploitable via thumbnail upload by an authenticated user and may require additional plugins in order to be exploited however this has not been confirmed at this time. This issue appears to have been partially, but not completely fixed in WordPress 4.9